fix transparency after drawing a picking scene
fix transparency after drawing a picking scene

CyrusBiotechnology/pv,biasmv/pv,biasmv/pv,CyrusBiotechnology/pv,Traksewt/pv,Traksewt/pv,Traksewt/pv,yuhangwang/pv,biasmv/pv,Traksewt/pv,biasmv/pv,yuhangwang/pv,yuhangwang/pv,CyrusBiotechnology/pv,yuhangwang/pv,CyrusBiotechnology/pv